date: Tue, 15 Jun 1999 19:01:19 +0100 (BST)
from: Suraje Dessai <S.Dessai@uea.ac.uk>
subject: Re: sea level!
to: Mike Hulme <m.hulme@uea.ac.uk>

After several re-runs I got the same results over and over.
Digging up a bit deeper I found out that Glacier, Greenland and Antartic 
melting (for 5.5xCO2) are all lower than for 4.5xCO2; sea expansion being 
higher as would be expected.
I think there must be some other parameter (in the sea-level model) we 
need to change.
Could you run MAGICC with 5.5xCO2 and one of your SRES scenarios just to 
double check?
I think Tom or Sarah probably know the answer to this problem.
Mark has given me an introductoty guide to IDL for my "light" reading 
travelling so I hope to be an "expert" next week!
I'll e-mail you when I get back and have some new results.
Suraje

On Tue, 15 Jun 1999, Mike Hulme wrote:

> Something seems wrong here ...... I cannot think why sea-level is less
> sensitive to a 5.5 dT than to a 4.5dT.
> 
> Check again.
> 
> Mike
> 
> At 08:37 15/06/99 +0100, you wrote:
> >Mike,
> >When I was building the matrices I found something strange. All sea-level 
> >rise for 5.5 climate sensitivity is smaller than for 4.5 sensitivity (a 
> >sample is below):
> >
> >0.5	1.5	2.5	3.5	4.5	5.5
> >0.4	18.1	24.9	59.2	70.9	102.2	87.1
> >1.1	17	23	56.1	67.3	97.7	82.6
> >1.8	15.9	21	52.8	63.4	92.9	77.9
> >
> >Is this normal? I thought I had made some mistake and re-ran MAGICC but I 
> >got the same values. Is there some kind of threshold in-built in MAGICC? 
> >If this is abnormal let me know.
> >Suraje
> >
> *****************************************************************************
> Dr Mike Hulme                    
> Reader in Climatology             tel: +44 1603 593162
> Climatic Research Unit            fax: +44 1603 507784
> School of Environmental Science   email:  m.hulme@uea.ac.uk
> University of East Anglia         web site: http://www.cru.uea.ac.uk/~mikeh/
> Norwich  NR4  7TJ                      
> *****************************************************************************
>          Annual mean temperature in Central England during 1999 
>               is about +1.6 deg C above the 1961-90 average
>         ***************************************************
>       The global-mean surface air temperature anomaly for 1998 
>  was +0.57 deg C above the 1961-90 average, the warmest year yet recorded
> *****************************************************************************
> 

